Perlmutter's office announced yesterday that he plans to introduce a "new, improved Assault Weapons Ban" with Representative Carolyn McCarthy of New York when Congress returns in January. His staff says he is working with members of the House and Senator Diane Feinstein to prepare the bill, which would outlaw the future sale of assault weapons, but, they say, protect the Second Amendment and provide exemptions for firearms used for sport, hunting and personal defense.

Perlmutter's bill will be the companion measure to a bill that will be introduced in the Senate by Feinstein, of California, who recently announced that she would bring this bill forward on the very first day possible.

"We had been working on it all fall," says Leslie Oliver, spokeswoman and policy director for Perlmutter. "We knew [we would introduce it]...early, it was just a matter of, are we ready to go? And I think Friday really sort of solidified that it's time."

She adds, "It should be dropped on January 3."

Just like the Aurora shooting, this latest shooting has been difficult for Perlmutter personally, Oliver says.

"Like most people in the country, it's raw still and it's very emotional," she says. "It does bring back everything that happened in Aurora, everything that happened with Gabby Giffords, everything that happened in Columbine. This is an issue that keeps coming up and he just feels very strongly that we have to act on this and it's Congress' responsibility to act. He's ready to take it on."

Continue for more on other gun control measures under discussion in the wake of the Newtown tragedy.

Oliver says that Perlmutter supports this measure and that he and his colleagues are pushing for a vote before the current Congress ends this year. If it does not come to a vote, she says, then this ban on high-capacity magazines would be included in Perlmutter's assault weapons ban to be introduced next month.

Oliver notes that he has supported an assault weapons ban since he was a state senator in Colorado, but that this is the first time he's introducing it.

In a statement, Perlmutter says this is not about gun control, but crime control:

It's time to do more than have a conversation about guns. It is Congress' responsibility to lead, and it's time for me to take action. This is about crime control and doing what we can to deter and prevent the kinds of tragedies we've experienced all too often in the last few years.

I've heard from so many law enforcement officers, people in my district and across the Colorado and the country who want us to move forward in a responsible way limiting access to weapons belong on battlefields. Our plan to renew the assault weapons ban takes these dangerous 'weapons of war' off the streets while protecting the rights of responsible gun owners and keeping our citizens safe.